Hi! Just bought this second hand RG8 from Gear4Music on Ebay. All stock electronics and such like. Loving the setup apart from the strings (factory, meaning that's a .65 as the lowest - way too thin for me!), but I'm having an issue with that lowest string: It seems to be a lot quieter than the 7th. Even if I tune up that 8th string to a B (which is fine considering the gague), it's still noticeably quieter than the 7th. I've tried adjusting the pickup height, but the problem persists. I don't *think* there's a volume problem with no amplification, but it's a little too quiet to tell. Would changing that 8th string to a heavier gague help? I'm a bit puzzled, so any advice would be fantastic.